I have a question reference O2 sensor placement when adding a turbo to a SR motor. The car that I picked up had an O2 sensor bung on the down pipe (turned out it is a 12mm thread post cat sensor from a 200SX) and of course the GTIR jpipe has a bung in it as well. Since the B13's only are wired for a single one and I am not running a secondary wide band monitor where would be the best placement for a sensor and should I use the normal B13 one? I am going to end up getting a new down pipe anyway since the current one is a bit messed up, so should I get one with an O2 bung in it or use the one in the Jpipe?

Factory O2 sensor is the one that I am talking about. I was mainly curious as the down pipe on the car I picked up had an O2 bung on the down pipe but the guy was only running an AFR gauge, not a wideband. He "misplaced" the jpipe he originally had on the car so I could not tell if he had it plugged or not. But either way I will be calling you later on Jason to get a down pipe among other things.

Ok new problem has cropped up. I can start the car, but only by giving it gas, if I let off it chokes and dies. When I give it a good amount of gas everything seems to run ok other than a miss here and there which I believe to be tied to the problem I am having while starting. Also the AFR is all over the place bouncing back and forth from lean to rich while I try to keep the engine running. The tach is still acting crazy though it does settle down and start to read once in a while, but I think that is mainly just a wiring issue after talking to you guys on the phone. And just to clarify I am trying all this without a down pipe until I can order another one. Any ideas?